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odrive's Progressive Sync uses tiny virtual placeholder files and folders to show you the items you have in your storage, without requiring you to download them in their entirety. That way you can see all the files available in storage at anytime, and handpick to download only the ones you need to use. Unsync a file or folder when you're done with it to reclaim your disk space. Configuration is in-line, granular, and readily visible through Finder or Explorer without having to go through a settings menu.
Progressive sync is even better in group contexts where you are sharing storage because it allows you to set an auto-download limit. This means if you share storage with Bob, and he adds a 10GB video file, you won't pay the bandwidth or hard disk cost of space! More information about Progressive Sync.
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